Your first (and better) thesis statement attempt: "While some are struggling to survive in this world today, Americans should appreciate what they have and realize the benefits this country has to offer them; that with hard work, determination, and a good education, anyone can succeed with the right attitude."

Get rid of the parts I've put in bold and you'll have a much more straightforward thesis statement. It'd be even better if you delete "with" and move "the right attitude" into the series before "anyone can succeed."